Bio-Dex #300 Tile Cleaner, 1 qt. BD300

This product worked great for us. We bought this as a last ditch effort to avoid hiring out tile cleaning. It took us about an hour to do our entire pool. We smeared it on fairly thick w a sponge than used a high power hose to rinse it. The worst areas took two passes.I think the mixed reviews are based on the type of tile. We have a white porcelain around most of the pool, which this worked great on. The smaller tiles didnt work as well because quite frankly, this doesnt handle grout that great.We plan to do touch up with muriatic acid on a few spots and the grout but this was very little scrubbing for a 95% improved tile line.